ATTINY28V-1MU Atmel, ATTINY28V-1MU Datasheet - Page 38
![IC MCU AVR 2K 1.8V 1.2MHZ 32-QFN](/photos/12/13/121309/313-32-qfn_sml.jpg)
ATTINY28V-1MU
Manufacturer Part Number
ATTINY28V-1MU
Description
IC MCU AVR 2K 1.8V 1.2MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY28V-1MU
Core Processor
AVR
Core Size
8-Bit
Speed
1.2MHz
Peripherals
POR, WDT
Number Of I /o
11
Program Memory Size
2KB (1K x 16)
Program Memory Type
FLASH
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Processor Series
ATTINY2x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
32 B
Maximum Clock Frequency
1.2 MHz
Number Of Programmable I/os
11
Number Of Timers
1
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit
For Use With
ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIPATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Ram Size
-
Data Converters
-
Connectivity
-
Lead Free Status / Rohs Status
Details
38
ATtiny28L/V
1. In the same operation, write a logical “1” to WDTOE and WDE. A logical “1” must
2. Within the next four clock cycles, write a logical “0” to WDE. This disables the
• Bits 2..0 – WDP2, WDP1, WDP0: Watchdog Timer Prescaler 2, 1 and 0
The WDP2, WDP1 and WDP0 bits determine the Watchdog Timer prescaling when the
Watchdog Timer is enabled. The different prescaling values and their corresponding
time-out periods are shown in Table 15.
Table 15. Watchdog Timer Prescale Select
Note:
WDP2
0
0
0
0
1
1
1
1
be written to WDE even though it is set to one before the disable operation starts.
Watchdog.
The frequency of the Watchdog oscillator is voltage-dependent, as shown in the section
“Typical Characteristics” on page 57.
The WDR (Watchdog Reset) instruction should always be executed before the Watchdog
Timer is enabled. This ensures that the reset period will be in accordance with the
Watchdog Timer prescale settings. If the Watchdog Timer is enabled without reset, the
Watchdog Timer may not start counting from zero.
WDP1
0
0
1
1
0
0
1
1
WDP0
0
1
0
1
0
1
0
1
Number of WDT
Oscillator
Cycles
16K cycles
32K cycles
64K cycles
128K cycles
256K cycles
512K cycles
1,024K cycles
2,048K cycles
Typical
Time-out at
V
0.15 s
0.30 s
0.60 s
1.2 s
2.4 s
4.8 s
9.6 s
19 s
CC
= 2.0V
Typical
Time-out at
V
47 ms
94 ms
0.19 s
0.38 s
0.75 s
1.5 s
3.0 s
6.0 s
CC
= 3.0V
1062F–AVR–07/06
Typical
Time-out at
V
15 ms
30 ms
60 ms
0.12 s
0.24 s
0.49 s
0.97 s
1.9 s
CC
= 5.0V